/Engine/Source/Editor/Experimental/EditorInteractiveToolsFramework/Public/Behaviors/2DViewportBehaviorTargets.h
Allows click-dragging to move the camera in the XY plane.
class FEditor2DScrollBehaviorTarget : public [IClickDragBehaviorTarget](API\Runtime\InteractiveToolsFramework\BaseBehaviors\IClickDragBehaviorTarget)
FVector3d
DragStart
FVector3d
OriginalCameraLocation
FEditorViewport...
ViewportClient
TODO: Replace with a context object to avoid dependency onFEditorViewportClient(JIRA UE-163677)